Seedless grapevine named ‘ARDTHIRTYSIX’

ABSTRACT

A new distinct variety of grapevine named ‘ARDTHIRTYSIX’ abundantly forms attractive crunchy seedless berries with a red skin coloration; medium density in medium clusters which display a naturally sweet flavor, the fruit is commonly ready for harvesting during August-September in San Joaquin Valley of Central California, U.S.A., and displays good eating qualities as a table grape. The fruit firmness renders the fruit well amenable for handling, shipping, and storage.

Classification: The present invention relates to a new Vitis vinifera Grapevine.

Variety denomination: The new Grapevine has a varietal denomination ‘ARDTHIRTYSIX’.

BACKGROUND OF THE INVENTION

A breeding program was initiated during the late 1990's near Bakersfield in San Joaquin Valley of Central California. In 2013, during this breeding program, a new variety of Vitis vinifera was created by deliberate cross breeding of two parent plants by emasculation of the pollen bearing organ of the female and introducing pollen from another male origin. The female parent of the new variety was 10−10+2, which is a very fertile and crispy seedless white table grape variety (non-patented in the United States). The male parent (i.e. the pollen parent) of the new variety was 8−7+7, a meaty and juicy red variety with a natural flavor (non-patented in the United States).

TABLE 1 ARDTHIRTYSIX compared with parents & closely related variety: Scarlet Royal 10 − 10 + 2 8 − 7 + 7 (U.S. Plant ARDTHIRTYSIX (Maternal) (Paternal) Pat. No. 16,229) Berry Narrow Cylindrical Broad Oval shape ellipsoid ellipsoid Brix 25 18 18 17 Berry Thin Medium Thin Medium - thick skin

The parentage of the new variety can be summarized as follows: 10−10+2×8−7+7

An artificial pollination was created, and the result was an embryo which possessed unique genetic qualities. The rudiments resulting from the above pollination were embryo rescued.

In 2014 the plant was transplanted to Bakersfield in San Joaquin Valley of Central California.

It was found that the new grapevine of the present invention possesses the following combination of characteristics:

-   -   (a) Forms attractive crunchy seedless berries with a red skin         coloration; medium density in medium clusters which display a         naturally sweet flavor,     -   (b) Commonly bears fruit during the month of August-September in         the San Joaquin Valley of Central California, U.S.A.,     -   (c) Bears fruit that is firm and is well amenable for storage,         handling, and shipping, and     -   (d) Produces 51 bunches per vine, and an average of about 2         bunches per shoot, at a total of 54 lbs fruit per vine.

The new variety during observation to date has displayed no visible disease, and has displayed an ability to well resist cold, drought, heat; but sensitive to direct exposure to sun and wind. The fruit of the new variety has been found to display excellent handling and shipping qualities combined with desirable dessert eating qualities.

The new variety of the present invention has been found to undergo asexual propagation beginning in 2015 near Bakersfield in the San Joaquin Valley of Central California, U.S.A. by bud grafting on mature Thompson rootstock (non-patented in the United States). Such asexual propagation has been conducted thereafter in successive years to date and has shown that the characteristics of the new variety are strictly transmissible from one generation to another. Accordingly, the new variety undergoes asexual propagation in a true to type manner.

SUMMARY OF THE INVENTION

The new variety ARDTHIRTYSIX is a red seedless table grape with a high production, e.g., about 51 bunches per vine, and an average of about 2 bunches per shoot.

Asexual reproduction by micro propagation of the new variety as performed near Bakersfield, Calif., U.S.A., shows that the forgoing and other distinguishing characteristics come true to form and are established and transmitted through succeeding propagations.

BRIEF DESCRIPTION OF THE DRAWING

The accompanying photographic illustration shows typical six-year-old specimens of the new variety, vegetatively propagated, in color as nearly true as it is reasonably possible to make in a color illustration of this character. Colors in the photograph may differ from the color values cited in the detailed botanical description below, which accurately describes the colors of the new Grapevine.

The drawing shows leaves, stems and grapes of ARDTHIRTYSIX.

DETAILED BOTANICAL DESCRIPTION

The chart used in the identification of colors is The R.H.S. Colour Chart of The ROYAL HORTICULTURAL SOCIETY (3^(rd) Edition). The description is based on the observation of plants growing on ‘Thompson Seedless’ rootstock outdoors near San Joaquin Valley of Central California, U.S.A.

Vine Characteristics:

vigor Vigorous upright shoots productive capacity Bearing at a natural, average capacity. Spur pruning. trunk Strong and developed. Diameter is 1.5 inches, measured at 5.9 inches above ground. Rough with a fibrous, shaggy exterior. Light maple brown coloring (greyed orange 165B)

Date of bud burst in Bakersfield Calif.: March 10^(th)

Young Shoot Characteristics:

Openness of tip slightly open Density of prostrate hairs on tip absent or very sparse Anthocyanin coloration of prostrate none (yellow green 144A) hairs on tip Density of erect hairs on tip absent or very sparse Young Leaf Characteristics:

Color of upper side of blade yellow green 152A Color of lower side of blade yellow green 151A Density of erect hairs between main absent or very sparse veins on upper side of blade Density of erect hairs between main absent or very sparse veins on lower side of blade Density of prostrate hairs on main absent or very sparse veins on upper side of blade Density of prostrate hairs on main absent or very sparse veins on lower side of blade Shoot Characteristics:

Attitude (before tying) semi-erect Color of dorsal side of internodes yellow green 144A Color of ventral side of internodes yellow green 152B Color of dorsal side of nodes yellow green 145A Color of ventral side of nodes yellow green 152D Density of erect hairs on internodes absent or very sparse Density of prostrate hairs on absent or very sparse internodes Length of tendrils 5.7 inches Diameter of tendrils 0.09 inches Color of tendrils yellow green 145A Number of tendrils at bloom 4 Positioning of first flowering and the first bunch is in the 4th node fruiting node Inflorescence number per flowering 2 shoot Flower Characteristics:

Reproductive organs fully developed stamens and fully developed gynoecium Flower length 0.4 inches Flower diameter 0.04 inches Pistil length 0.06 inches Pistil color green 141C Pollen Amount rich Pollen color yellow 11C Stamen color yellow green 144B Stamen length 0.17 inches Number of stamen 6

First bloom in Bakersfield, Calif.: 1^(st) May

Date of full bloom in Bakersfield, Calif.: 8^(th) May

Mature Leaf Characteristics:

Size of blade 8.5 × 7.5 inches Shape of blade pentagonal Base descriptors pentagonal Leaf margin doubly serrate Leaf apex acute Blistering of upper side of blade absent or very sparse Depth of upper lateral sinuses absent or very shallow Number of lobes five (Only varieties with lobed leaves) closed Arrangement of lobes of upper lateral sinuses Arrangement of lobes of petiole slightly open sinus Length of teeth 0.6 inches Ratio length/width of teeth medium Shape of teeth both sides convex Density of prostrate hairs between absent or very sparse main veins on lower side of blade Density of erect hairs on main veins absent or very sparse on lower side of blade Density of erect hairs between the absent or very sparse main veins on upper side of blade Density of prostrate hairs on main absent or very sparse veins on upper side of blade Length of petiole compared to length much longer of middle vein Top side color yellow green 147A Bottom side color yellow green 147B Texture of upper side of blade smooth Texture of lower side of blade smooth Vein color on upper blade yellow green 145A Vein color on lower blade yellow green 145C Venation pattern for upper blade netlike venation Venation patten for lower blade netlike venation Petiole length 4.9 inches Petiole diameter 0.15 inches Petiole color yellow green 146D Petiole texture smooth

Date of beginning of berry ripening in Bakersfield Calif.: 2^(nd) August

Bunch Characteristics:

Size (peduncle excluded) medium Density of berries on bunch medium Bunch length 5.5 inches Bunch diameter 5.2 inches Length of peduncle of primary bunch 1.9 inches Diameter of peduncle of primary 0.2 inches bunch Peduncle of primary bunch color yellow green 145A Peduncle texture smooth Bunches per vine 51 Average bunch weight 1.3 lbs Berry Characteristics:

Size medium Length 1.2 inches Weight 0.3 oz Diameter 0.9 inches Shape narrow ellipsoid Color of skin (without bloom) red 53A Flesh color greyed green 193A Brix 25 Titrabable acidity percentage 3.9% Juice 3.6 ph Ease of detachment from pedicel difficult Thickness of skin thin Anthocyanin coloration of flesh none Firmness of flesh moderately firm Particular flavor natural, sweet Formation of seeds none Berries per bunch 76 Pedicel Characteristics:

Length 0.4 inches Diameter 0.1 inches Color yellow green 144A Pedicel texture rough Woody Shoot Characteristics:

Woody shoot texture rough Woody shoot color greyed orange 165A Woody shoot length 136 inches Diameter 0.45 inches Internode length 4.2 inches

Market use of observed plants: Fresh market

Age And Growing Conditions:

Six years growing under Y system in South Joaquin Valley (hot, dry summers)

Shipping Characteristics:

Fruit was in cold storage. Stored in poly bags inside Styrofoam boxes with sulfur pads. After 30 Days: rachises were 40% green; 0% berry shattering; no berry wrinkling or cracks were apparent.

DNA Profile

To further the characterize the new variety DNA was extracted from plant samples and a DNA profile was obtained at California Seed & Plant Lab, California USA using base pairs for 10 standard microsatellite DNA markers. The data is presented hereafter.

TABLE 2 DNA profile for ARDTHIRTYSIX Microsatellite DNA Marker Allele Sizes in Base Pairs M1 228 238 M2 239 249 M3 179 194 M4 216 220 M5 257 273 M6 135 151 M7 187 189 M8 255 257 M9 214 214  M10 221 237

The ARDTHIRTYSIX variety has not been observed under all possible environmental conditions to date. Accordingly, it is possible that the phenotypic expression may vary somewhat with changes in light intensity and duration, cultural practices, and other environmental conditions.

Additional information relating to plant and fruit disease and pest resistance or susceptibility has not been observed to date. Specification of the plant hardiness zone and the heat/cold resistance has not been observed to date. 

What is claimed is:
 1. A new and distinct grapevine, botanically known as Vitis vinifera, identified as ‘ARDTHIRTYSIX’, substantially as shown and described herein. 